Generating asset catalogs in multiple libraries using an SPM plugin leads to failing builds

Hi,

we are currently trying to use an SPM plugin to automatically include the icon resources in our app that are used in code.
For that, we use a buildCommand plugin that automatically extracts the required icon IDs and includes them in a "xcassets" catalog who's path is is later on included in the outputFiles parameter.

However, as soon as two libraries in the same app use a BuildToolPlugin which both generate Xcode assets, the app fails with the following error message:

Multiple commands produce '~/Library/Developer/Xcode/DerivedData/.../Build/Products/Debug-iphoneos/Assets.car'

Target 'Library1' (project 'Library1') has compile command with input '~/Library/Developer/Xcode/DerivedData/.../SourcePackages/library1-git/Library1/IconGenerator/GeneratedResources/IconSet-Library1.xcassets'
Target 'Library2' (project 'Library2') has compile command with input '~/Library/Developer/Xcode/DerivedData/.../SourcePackages/library2-git/Library2/IconGenerator/GeneratedResources/IconSet-Library2.xcassets'

Does anybody have a clue how to bypass this error?

Cheers,
Yannik